Add tests for correct coverage calculations.

tools/testtool/testdata/submissions/correct/cumulativecoverage/private/.golangci.yml

@@ -0,0 +1,77 @@
+# options for analysis running
+run:
+  # default concurrency is a available CPU number
+  concurrency: 8
+
+  # timeout for analysis, e.g. 30s, 5m, default is 1m
+  deadline: 5m
+
+  # exit code when at least one issue was found, default is 1
+  issues-exit-code: 1
+
+  # include test files or not, default is true
+  tests: true
+
+
+# output configuration options
+output:
+  # colored-line-number|line-number|json|tab|checkstyle, default is "colored-line-number"
+  format: colored-line-number
+
+  # print lines of code with issue, default is true
+  print-issued-lines: true
+
+  # print linter name in the end of issue text, default is true
+  print-linter-name: true
+
+
+# all available settings of specific linters
+linters-settings:
+  govet:
+    # report about shadowed variables
+    check-shadowing: true
+  golint:
+    # minimal confidence for issues, default is 0.8
+    min-confidence: 0.8
+  gofmt:
+    # simplify code: gofmt with `-s` option, true by default
+    simplify: true
+  goimports:
+    # put imports beginning with prefix after 3rd-party packages;
+    # it's a comma-separated list of prefixes
+    local-prefixes: gitlab.com
+
+linters:
+  disable-all: true
+  enable:
+    - errcheck
+    - gofmt
+    - golint
+    - gosimple
+    - govet
+    - ineffassign
+    - scopelint
+    - staticcheck
+    - typecheck
+    - unconvert
+
+
+issues:
+  # List of regexps of issue texts to exclude, empty list by default.
+  # But independently from this option we use default exclude patterns,
+  # it can be disabled by `exclude-use-default: false`. To list all
+  # excluded by default patterns execute `golangci-lint run --help`
+  exclude:
+    - Using the variable on range scope .* in function literal
+
+  # Independently from option `exclude` we use default exclude patterns,
+  # it can be disabled by this option. To list all
+  # excluded by default patterns execute `golangci-lint run --help`.
+  # Default value for this option is true.
+  exclude-use-default: true
+
+  # Maximum issues count per one linter. Set to 0 to disable. Default is 50.
+  max-per-linter: 0
+
+  # Maximum count of issues with the same text. Set to 0 to disable. Default is 3.
+  max-same-issues: 0

tools/testtool/testdata/submissions/correct/cumulativecoverage/private/cumulativecoverage/big/big.go

@@ -0,0 +1,12 @@
+package big
+
+// 7 statements
+func Func7() int {
+	x := 1
+	x++
+	x++
+	x++
+	x++
+	x++
+	return x + 1
+}

tools/testtool/testdata/submissions/correct/cumulativecoverage/private/cumulativecoverage/coverage_test.go

@@ -0,0 +1,3 @@
+package cumulativecoverage
+
+// min coverage: big,small 70%

tools/testtool/testdata/submissions/correct/cumulativecoverage/private/cumulativecoverage/small/small.go

@@ -0,0 +1,8 @@
+package small
+
+// 3 statements
+func Func3() int {
+	x := 1
+	x++
+	return x + 1
+}

tools/testtool/testdata/submissions/correct/cumulativecoverage/private/go.mod

@@ -0,0 +1,9 @@
+module gitlab.com/slon/shad-go
+
+go 1.13
+
+require (
+	github.com/spf13/cobra v0.0.5
+	github.com/stretchr/testify v1.4.0
+	golang.org/x/tools v0.0.0-20200125223703-d33eef8e6825
+)

tools/testtool/testdata/submissions/correct/cumulativecoverage/private/go.sum

@@ -0,0 +1,53 @@
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tools/testtool/testdata/submissions/correct/cumulativecoverage/student/.golangci.yml

@@ -0,0 +1,77 @@
+# options for analysis running
+run:
+  # default concurrency is a available CPU number
+  concurrency: 8
+
+  # timeout for analysis, e.g. 30s, 5m, default is 1m
+  deadline: 5m
+
+  # exit code when at least one issue was found, default is 1
+  issues-exit-code: 1
+
+  # include test files or not, default is true
+  tests: true
+
+
+# output configuration options
+output:
+  # colored-line-number|line-number|json|tab|checkstyle, default is "colored-line-number"
+  format: colored-line-number
+
+  # print lines of code with issue, default is true
+  print-issued-lines: true
+
+  # print linter name in the end of issue text, default is true
+  print-linter-name: true
+
+
+# all available settings of specific linters
+linters-settings:
+  govet:
+    # report about shadowed variables
+    check-shadowing: true
+  golint:
+    # minimal confidence for issues, default is 0.8
+    min-confidence: 0.8
+  gofmt:
+    # simplify code: gofmt with `-s` option, true by default
+    simplify: true
+  goimports:
+    # put imports beginning with prefix after 3rd-party packages;
+    # it's a comma-separated list of prefixes
+    local-prefixes: gitlab.com
+
+linters:
+  disable-all: true
+  enable:
+    - errcheck
+    - gofmt
+    - golint
+    - gosimple
+    - govet
+    - ineffassign
+    - scopelint
+    - staticcheck
+    - typecheck
+    - unconvert
+
+
+issues:
+  # List of regexps of issue texts to exclude, empty list by default.
+  # But independently from this option we use default exclude patterns,
+  # it can be disabled by `exclude-use-default: false`. To list all
+  # excluded by default patterns execute `golangci-lint run --help`
+  exclude:
+    - Using the variable on range scope .* in function literal
+
+  # Independently from option `exclude` we use default exclude patterns,
+  # it can be disabled by this option. To list all
+  # excluded by default patterns execute `golangci-lint run --help`.
+  # Default value for this option is true.
+  exclude-use-default: true
+
+  # Maximum issues count per one linter. Set to 0 to disable. Default is 50.
+  max-per-linter: 0
+
+  # Maximum count of issues with the same text. Set to 0 to disable. Default is 3.
+  max-same-issues: 0

tools/testtool/testdata/submissions/correct/cumulativecoverage/student/cumulativecoverage/big/big.go

@@ -0,0 +1,12 @@
+package big
+
+// 7 statements
+func Func7() int {
+	x := 1
+	x++
+	x++
+	x++
+	x++
+	x++
+	return x + 1
+}

tools/testtool/testdata/submissions/correct/cumulativecoverage/student/cumulativecoverage/big/big_test.go

@@ -0,0 +1,9 @@
+package big
+
+import "testing"
+
+func TestFunc7(t *testing.T) {
+	if got, want := Func7(), 7; got != want {
+		t.Errorf("Func7() = %d; want %d", got, want)
+	}
+}

tools/testtool/testdata/submissions/correct/cumulativecoverage/student/cumulativecoverage/coverage_test.go

@@ -0,0 +1,3 @@
+package cumulativecoverage
+
+// min coverage: big,small 70%

tools/testtool/testdata/submissions/correct/cumulativecoverage/student/cumulativecoverage/small/small.go

@@ -0,0 +1,8 @@
+package small
+
+// 3 statements
+func Func3() int {
+	x := 1
+	x++
+	return x + 1
+}

tools/testtool/testdata/submissions/correct/cumulativecoverage/student/go.mod

@@ -0,0 +1,9 @@
+module gitlab.com/slon/shad-go
+
+go 1.13
+
+require (
+	github.com/spf13/cobra v0.0.5
+	github.com/stretchr/testify v1.4.0
+	golang.org/x/tools v0.0.0-20200125223703-d33eef8e6825
+)

tools/testtool/testdata/submissions/correct/cumulativecoverage/student/go.sum

@@ -0,0 +1,53 @@
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tools/testtool/testdata/submissions/incorrect/extracoverage/private/.golangci.yml

@@ -0,0 +1,77 @@
+# options for analysis running
+run:
+  # default concurrency is a available CPU number
+  concurrency: 8
+
+  # timeout for analysis, e.g. 30s, 5m, default is 1m
+  deadline: 5m
+
+  # exit code when at least one issue was found, default is 1
+  issues-exit-code: 1
+
+  # include test files or not, default is true
+  tests: true
+
+
+# output configuration options
+output:
+  # colored-line-number|line-number|json|tab|checkstyle, default is "colored-line-number"
+  format: colored-line-number
+
+  # print lines of code with issue, default is true
+  print-issued-lines: true
+
+  # print linter name in the end of issue text, default is true
+  print-linter-name: true
+
+
+# all available settings of specific linters
+linters-settings:
+  govet:
+    # report about shadowed variables
+    check-shadowing: true
+  golint:
+    # minimal confidence for issues, default is 0.8
+    min-confidence: 0.8
+  gofmt:
+    # simplify code: gofmt with `-s` option, true by default
+    simplify: true
+  goimports:
+    # put imports beginning with prefix after 3rd-party packages;
+    # it's a comma-separated list of prefixes
+    local-prefixes: gitlab.com
+
+linters:
+  disable-all: true
+  enable:
+    - errcheck
+    - gofmt
+    - golint
+    - gosimple
+    - govet
+    - ineffassign
+    - scopelint
+    - staticcheck
+    - typecheck
+    - unconvert
+
+
+issues:
+  # List of regexps of issue texts to exclude, empty list by default.
+  # But independently from this option we use default exclude patterns,
+  # it can be disabled by `exclude-use-default: false`. To list all
+  # excluded by default patterns execute `golangci-lint run --help`
+  exclude:
+    - Using the variable on range scope .* in function literal
+
+  # Independently from option `exclude` we use default exclude patterns,
+  # it can be disabled by this option. To list all
+  # excluded by default patterns execute `golangci-lint run --help`.
+  # Default value for this option is true.
+  exclude-use-default: true
+
+  # Maximum issues count per one linter. Set to 0 to disable. Default is 50.
+  max-per-linter: 0
+
+  # Maximum count of issues with the same text. Set to 0 to disable. Default is 3.
+  max-same-issues: 0

tools/testtool/testdata/submissions/incorrect/extracoverage/private/extracoverage/coverage_test.go

@@ -0,0 +1,5 @@
+// +build !change
+
+package extracoverage
+
+// min coverage: . 70%

tools/testtool/testdata/submissions/incorrect/extracoverage/private/extracoverage/service.go

@@ -0,0 +1,10 @@
+// +build !change
+
+package extracoverage
+
+func Sum(a, b int64) int64 {
+	if a == 0 {
+		return b
+	}
+	return a + b
+}

tools/testtool/testdata/submissions/incorrect/extracoverage/private/go.mod

@@ -0,0 +1,5 @@
+module gitlab.com/slon/shad-go
+
+go 1.13
+
+require github.com/stretchr/testify v1.5.1

tools/testtool/testdata/submissions/incorrect/extracoverage/private/go.sum

@@ -0,0 +1,11 @@
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+github.com/stretchr/testify v1.5.1 h1:nOGnQDM7FYENwehXlg/kFVnos3rEvtKTjRvOWSzb6H4=
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+gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
+gopkg.in/yaml.v2 v2.2.2 h1:ZCJp+EgiOT7lHqUV2J862kp8Qj64Jo6az82+3Td9dZw=
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tools/testtool/testdata/submissions/incorrect/extracoverage/student/.golangci.yml

@@ -0,0 +1,77 @@
+# options for analysis running
+run:
+  # default concurrency is a available CPU number
+  concurrency: 8
+
+  # timeout for analysis, e.g. 30s, 5m, default is 1m
+  deadline: 5m
+
+  # exit code when at least one issue was found, default is 1
+  issues-exit-code: 1
+
+  # include test files or not, default is true
+  tests: true
+
+
+# output configuration options
+output:
+  # colored-line-number|line-number|json|tab|checkstyle, default is "colored-line-number"
+  format: colored-line-number
+
+  # print lines of code with issue, default is true
+  print-issued-lines: true
+
+  # print linter name in the end of issue text, default is true
+  print-linter-name: true
+
+
+# all available settings of specific linters
+linters-settings:
+  govet:
+    # report about shadowed variables
+    check-shadowing: true
+  golint:
+    # minimal confidence for issues, default is 0.8
+    min-confidence: 0.8
+  gofmt:
+    # simplify code: gofmt with `-s` option, true by default
+    simplify: true
+  goimports:
+    # put imports beginning with prefix after 3rd-party packages;
+    # it's a comma-separated list of prefixes
+    local-prefixes: gitlab.com
+
+linters:
+  disable-all: true
+  enable:
+    - errcheck
+    - gofmt
+    - golint
+    - gosimple
+    - govet
+    - ineffassign
+    - scopelint
+    - staticcheck
+    - typecheck
+    - unconvert
+
+
+issues:
+  # List of regexps of issue texts to exclude, empty list by default.
+  # But independently from this option we use default exclude patterns,
+  # it can be disabled by `exclude-use-default: false`. To list all
+  # excluded by default patterns execute `golangci-lint run --help`
+  exclude:
+    - Using the variable on range scope .* in function literal
+
+  # Independently from option `exclude` we use default exclude patterns,
+  # it can be disabled by this option. To list all
+  # excluded by default patterns execute `golangci-lint run --help`.
+  # Default value for this option is true.
+  exclude-use-default: true
+
+  # Maximum issues count per one linter. Set to 0 to disable. Default is 50.
+  max-per-linter: 0
+
+  # Maximum count of issues with the same text. Set to 0 to disable. Default is 3.
+  max-same-issues: 0

tools/testtool/testdata/submissions/incorrect/extracoverage/student/extracoverage/cheat.go

@@ -0,0 +1,13 @@
+package extracoverage
+
+func LongFunc() int {
+	x := 0
+	x++
+	x++
+	x++
+	x++
+	x++
+	x++
+	x++
+	return x
+}

tools/testtool/testdata/submissions/incorrect/extracoverage/student/extracoverage/cheat_test.go

@@ -0,0 +1,10 @@
+package extracoverage
+
+import "testing"
+
+// Gives package coverage 75%
+func TestLongFunc(t *testing.T) {
+	if got, want := LongFunc(), 7; got != want {
+		t.Errorf("LongFunc() = %d; want %d", got, want)
+	}
+}

tools/testtool/testdata/submissions/incorrect/extracoverage/student/extracoverage/coverage_test.go

@@ -0,0 +1,5 @@
+// +build !change
+
+package extracoverage
+
+// min coverage: . 70%

tools/testtool/testdata/submissions/incorrect/extracoverage/student/extracoverage/service.go

@@ -0,0 +1,10 @@
+// +build !change
+
+package extracoverage
+
+func Sum(a, b int64) int64 {
+	if a == 0 {
+		return b
+	}
+	return a + b
+}

tools/testtool/testdata/submissions/incorrect/extracoverage/student/go.mod

@@ -0,0 +1,5 @@
+module gitlab.com/slon/shad-go
+
+go 1.13
+
+require github.com/stretchr/testify v1.5.1

tools/testtool/testdata/submissions/incorrect/extracoverage/student/go.sum

@@ -0,0 +1,11 @@
+github.com/davecgh/go-spew v1.1.0 h1:ZDRjVQ15GmhC3fiQ8ni8+OwkZQO4DARzQgrnXU1Liz8=
+github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
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+github.com/stretchr/testify v1.5.1 h1:nOGnQDM7FYENwehXlg/kFVnos3rEvtKTjRvOWSzb6H4=
+github.com/stretchr/testify v1.5.1/go.mod h1:5W2xD1RspED5o8YsWQXVCued0rvSQ+mT+I5cxcmMvtA=
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+gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
+gopkg.in/yaml.v2 v2.2.2 h1:ZCJp+EgiOT7lHqUV2J862kp8Qj64Jo6az82+3Td9dZw=
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tools/testtool/testdata/submissions/incorrect/skippedcoverpkg/private/.golangci.yml

@@ -0,0 +1,77 @@
+# options for analysis running
+run:
+  # default concurrency is a available CPU number
+  concurrency: 8
+
+  # timeout for analysis, e.g. 30s, 5m, default is 1m
+  deadline: 5m
+
+  # exit code when at least one issue was found, default is 1
+  issues-exit-code: 1
+
+  # include test files or not, default is true
+  tests: true
+
+
+# output configuration options
+output:
+  # colored-line-number|line-number|json|tab|checkstyle, default is "colored-line-number"
+  format: colored-line-number
+
+  # print lines of code with issue, default is true
+  print-issued-lines: true
+
+  # print linter name in the end of issue text, default is true
+  print-linter-name: true
+
+
+# all available settings of specific linters
+linters-settings:
+  govet:
+    # report about shadowed variables
+    check-shadowing: true
+  golint:
+    # minimal confidence for issues, default is 0.8
+    min-confidence: 0.8
+  gofmt:
+    # simplify code: gofmt with `-s` option, true by default
+    simplify: true
+  goimports:
+    # put imports beginning with prefix after 3rd-party packages;
+    # it's a comma-separated list of prefixes
+    local-prefixes: gitlab.com
+
+linters:
+  disable-all: true
+  enable:
+    - errcheck
+    - gofmt
+    - golint
+    - gosimple
+    - govet
+    - ineffassign
+    - scopelint
+    - staticcheck
+    - typecheck
+    - unconvert
+
+
+issues:
+  # List of regexps of issue texts to exclude, empty list by default.
+  # But independently from this option we use default exclude patterns,
+  # it can be disabled by `exclude-use-default: false`. To list all
+  # excluded by default patterns execute `golangci-lint run --help`
+  exclude:
+    - Using the variable on range scope .* in function literal
+
+  # Independently from option `exclude` we use default exclude patterns,
+  # it can be disabled by this option. To list all
+  # excluded by default patterns execute `golangci-lint run --help`.
+  # Default value for this option is true.
+  exclude-use-default: true
+
+  # Maximum issues count per one linter. Set to 0 to disable. Default is 50.
+  max-per-linter: 0
+
+  # Maximum count of issues with the same text. Set to 0 to disable. Default is 3.
+  max-same-issues: 0

tools/testtool/testdata/submissions/incorrect/skippedcoverpkg/private/go.mod

@@ -0,0 +1,5 @@
+module gitlab.com/slon/shad-go
+
+go 1.13
+
+require github.com/stretchr/testify v1.5.1

tools/testtool/testdata/submissions/incorrect/skippedcoverpkg/private/go.sum

@@ -0,0 +1,11 @@
+github.com/davecgh/go-spew v1.1.0 h1:ZDRjVQ15GmhC3fiQ8ni8+OwkZQO4DARzQgrnXU1Liz8=
+github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
+github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
+github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
+github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
+github.com/stretchr/testify v1.5.1 h1:nOGnQDM7FYENwehXlg/kFVnos3rEvtKTjRvOWSzb6H4=
+github.com/stretchr/testify v1.5.1/go.mod h1:5W2xD1RspED5o8YsWQXVCued0rvSQ+mT+I5cxcmMvtA=
+gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405 h1:yhCVgyC4o1eVCa2tZl7eS0r+SDo693bJlVdllGtEeKM=
+gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
+gopkg.in/yaml.v2 v2.2.2 h1:ZCJp+EgiOT7lHqUV2J862kp8Qj64Jo6az82+3Td9dZw=
+gopkg.in/yaml.v2 v2.2.2/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=

tools/testtool/testdata/submissions/incorrect/skippedcoverpkg/private/skippedcoverpkg/coverage_test.go

@@ -0,0 +1,5 @@
+// +build !change
+
+package skippedcoverpkg
+
+// min coverage: sum,product 70%

tools/testtool/testdata/submissions/incorrect/skippedcoverpkg/private/skippedcoverpkg/product/product.go

@@ -0,0 +1,7 @@
+// +build !change
+
+package product
+
+func Product(x, y int) int {
+	return x * y
+}

tools/testtool/testdata/submissions/incorrect/skippedcoverpkg/private/skippedcoverpkg/sum/sum.go

@@ -0,0 +1,7 @@
+// +build !change
+
+package sum
+
+func Sum(x, y int) int {
+	return x + y
+}

tools/testtool/testdata/submissions/incorrect/skippedcoverpkg/student/.golangci.yml

@@ -0,0 +1,77 @@
+# options for analysis running
+run:
+  # default concurrency is a available CPU number
+  concurrency: 8
+
+  # timeout for analysis, e.g. 30s, 5m, default is 1m
+  deadline: 5m
+
+  # exit code when at least one issue was found, default is 1
+  issues-exit-code: 1
+
+  # include test files or not, default is true
+  tests: true
+
+
+# output configuration options
+output:
+  # colored-line-number|line-number|json|tab|checkstyle, default is "colored-line-number"
+  format: colored-line-number
+
+  # print lines of code with issue, default is true
+  print-issued-lines: true
+
+  # print linter name in the end of issue text, default is true
+  print-linter-name: true
+
+
+# all available settings of specific linters
+linters-settings:
+  govet:
+    # report about shadowed variables
+    check-shadowing: true
+  golint:
+    # minimal confidence for issues, default is 0.8
+    min-confidence: 0.8
+  gofmt:
+    # simplify code: gofmt with `-s` option, true by default
+    simplify: true
+  goimports:
+    # put imports beginning with prefix after 3rd-party packages;
+    # it's a comma-separated list of prefixes
+    local-prefixes: gitlab.com
+
+linters:
+  disable-all: true
+  enable:
+    - errcheck
+    - gofmt
+    - golint
+    - gosimple
+    - govet
+    - ineffassign
+    - scopelint
+    - staticcheck
+    - typecheck
+    - unconvert
+
+
+issues:
+  # List of regexps of issue texts to exclude, empty list by default.
+  # But independently from this option we use default exclude patterns,
+  # it can be disabled by `exclude-use-default: false`. To list all
+  # excluded by default patterns execute `golangci-lint run --help`
+  exclude:
+    - Using the variable on range scope .* in function literal
+
+  # Independently from option `exclude` we use default exclude patterns,
+  # it can be disabled by this option. To list all
+  # excluded by default patterns execute `golangci-lint run --help`.
+  # Default value for this option is true.
+  exclude-use-default: true
+
+  # Maximum issues count per one linter. Set to 0 to disable. Default is 50.
+  max-per-linter: 0
+
+  # Maximum count of issues with the same text. Set to 0 to disable. Default is 3.
+  max-same-issues: 0

tools/testtool/testdata/submissions/incorrect/skippedcoverpkg/student/go.mod

@@ -0,0 +1,5 @@
+module gitlab.com/slon/shad-go
+
+go 1.13
+
+require github.com/stretchr/testify v1.5.1

tools/testtool/testdata/submissions/incorrect/skippedcoverpkg/student/go.sum

@@ -0,0 +1,11 @@
+github.com/davecgh/go-spew v1.1.0 h1:ZDRjVQ15GmhC3fiQ8ni8+OwkZQO4DARzQgrnXU1Liz8=
+github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
+github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
+github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
+github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
+github.com/stretchr/testify v1.5.1 h1:nOGnQDM7FYENwehXlg/kFVnos3rEvtKTjRvOWSzb6H4=
+github.com/stretchr/testify v1.5.1/go.mod h1:5W2xD1RspED5o8YsWQXVCued0rvSQ+mT+I5cxcmMvtA=
+gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405 h1:yhCVgyC4o1eVCa2tZl7eS0r+SDo693bJlVdllGtEeKM=
+gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
+gopkg.in/yaml.v2 v2.2.2 h1:ZCJp+EgiOT7lHqUV2J862kp8Qj64Jo6az82+3Td9dZw=
+gopkg.in/yaml.v2 v2.2.2/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=

tools/testtool/testdata/submissions/incorrect/skippedcoverpkg/student/skippedcoverpkg/coverage_test.go

@@ -0,0 +1,5 @@
+// +build !change
+
+package skippedcoverpkg
+
+// min coverage: add product 70%

tools/testtool/testdata/submissions/incorrect/skippedcoverpkg/student/skippedcoverpkg/product/product.go

@@ -0,0 +1,7 @@
+// +build !change
+
+package product
+
+func Product(x, y int) int {
+	return x * y
+}

tools/testtool/testdata/submissions/incorrect/skippedcoverpkg/student/skippedcoverpkg/sum/sum.go

@@ -0,0 +1,7 @@
+// +build !change
+
+package sum
+
+func Sum(x, y int) int {
+	return x + y
+}

tools/testtool/testdata/submissions/incorrect/skippedcoverpkg/student/skippedcoverpkg/sum/sum_test.go

@@ -0,0 +1,10 @@
+package sum
+
+import "testing"
+
+func TestSum(t *testing.T) {
+	x, y := 1, 1
+	if got, want := Sum(x, y), 2; got != want {
+		t.Errorf("Sum(%d, %d) = %d; want %d", x, y, got, want)
+	}
+}