Add solutions for testdata sumbssions related to new coverage calculation logic.

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

@@ -0,0 +1,11 @@
+// +build solution
+
+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/private/cumulativecoverage/small/solution_test.go

@@ -0,0 +1,11 @@
+// +build solution
+
+package small
+
+import "testing"
+
+func TestFunc3(t *testing.T) {
+	if got, want := Func3(), 3; got != want {
+		t.Errorf("Func3() = %d; want %d", got, want)
+	}
+}

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

@@ -0,0 +1,14 @@
+// +build solution
+
+package extracoverage
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/require"
+)
+
+func TestSum(t *testing.T) {
+	require.Equal(t, int64(2), Sum(1, 1))
+	require.Equal(t, int64(1), Sum(0, 1))
+}

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

@@ -0,0 +1,12 @@
+// +build solution
+
+package product
+
+import "testing"
+
+func TestProduct(t *testing.T) {
+	x, y := 3, 3
+	if got, want := Product(x, y), 9; got != want {
+		t.Errorf("Product(%d, %d) = %d; want %d", x, y, got, want)
+	}
+}

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

@@ -0,0 +1,12 @@
+// +build solution
+
+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)
+	}
+}