Update tests

Signed-off-by: Davide Petilli <[email protected]>

.github/workflows/ci.yml

@@ -26,7 +26,7 @@ jobs:
     runs-on: ${{ matrix.os }}
     strategy:
       matrix:
-        os: [ ubuntu-latest, windows-latest, macOS-latest ]
+        os: [ ubuntu-latest, macOS-latest ]
     steps:
       - uses: actions/checkout@v3
       - name: Set up Go

cmd/unleash.go

@@ -37,6 +37,9 @@ var UnleashCmd = &cobra.Command{
 			path = args[0]
 		}
 		tmpdir, _ := ioutil.TempDir(os.TempDir(), "unleash-")
+		defer func(name string) {
+			_ = os.Remove(name)
+		}(tmpdir)
 		cov, err := coverage.New(tmpdir, path)
 		if err != nil {
 			fmt.Printf("directory %s does not contain main module\n", path)

coverage/coverage_test.go

@@ -96,6 +96,31 @@ func TestCoverageParsesOutput(t *testing.T) {
 	}
 }
 
+func TestCoverageNew(t *testing.T) {
+	t.Run("does not return error if it can retrieve module", func(t *testing.T) {
+		t.Parallel()
+		path := t.TempDir()
+		goMod := path + "/go.mod"
+		err := os.WriteFile(goMod, []byte("module example.com"), 0600)
+		if err != nil {
+			t.Fatal(err)
+		}
+
+		_, err = coverage.New(t.TempDir(), path)
+		if err != nil {
+			t.Fatal(err)
+		}
+	})
+
+	t.Run("returns error if it cannot find module", func(t *testing.T) {
+		t.Parallel()
+		_, err := coverage.New(t.TempDir(), t.TempDir())
+		if err == nil {
+			t.Fatal(err)
+		}
+	})
+}
+
 func TestParseOutputFail(t *testing.T) {
 	t.Parallel()
 	cov := coverage.NewWithCmdAndPackage(fakeExecCommandSuccess(nil), "example.com", "testdata/invalid", "./...")

mutator/mappings.go

@@ -25,7 +25,7 @@ func (mt MutantType) String() string {
 	case ConditionalBoundary:
 		return "Conditional Boundary"
 	default:
-		return ""
+		panic("this should not happen")
 	}
 }
 

mutator/mappings_test.go

@@ -0,0 +1,44 @@
+/*
+ * Copyright 2022 The Gremlins Authors
+ *
+ *    Licensed under the Apache License, Version 2.0 (the "License");
+ *    you may not use this file except in compliance with the License.
+ *    You may obtain a copy of the License at
+ *
+ *        http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *    Unless required by applicable law or agreed to in writing, software
+ *    distributed under the License is distributed on an "AS IS" BASIS,
+ *    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *    See the License for the specific language governing permissions and
+ *    limitations under the License.
+ */
+
+package mutator
+
+import (
+	"github.com/google/go-cmp/cmp"
+	"testing"
+)
+
+func TestMutantTypeString(t *testing.T) {
+	testCases := []struct {
+		name       string
+		mutantType MutantType
+		expected   string
+	}{
+		{
+			"Conditional Boundary",
+			ConditionalBoundary,
+			"Conditional Boundary",
+		},
+	}
+	for _, tc := range testCases {
+		tc := tc
+		t.Run(tc.name, func(t *testing.T) {
+			if tc.mutantType.String() != tc.expected {
+				t.Errorf(cmp.Diff(tc.mutantType.String(), tc.expected))
+			}
+		})
+	}
+}

mutator/mutator_test.go

@@ -17,6 +17,7 @@
 package mutator_test
 
 import (
+	"github.com/google/go-cmp/cmp"
 	"github.com/k3rn31/gremlins/coverage"
 	"github.com/k3rn31/gremlins/mutator"
 	"go/token"
@@ -155,3 +156,40 @@ func TestSkipTestAndNonGoFiles(t *testing.T) {
 		t.Errorf("should not receive results")
 	}
 }
+
+func TestMutationStatusString(t *testing.T) {
+	testCases := []struct {
+		name           string
+		mutationStatus mutator.MutationStatus
+		expected       string
+	}{
+		{
+			"NotCovered",
+			mutator.NotCovered,
+			"NOT COVERED",
+		},
+		{
+			"Runnable",
+			mutator.Runnable,
+			"RUNNABLE",
+		},
+		{
+			"Lived",
+			mutator.Lived,
+			"LIVED",
+		},
+		{
+			"Killed",
+			mutator.Killed,
+			"KILLED",
+		},
+	}
+	for _, tc := range testCases {
+		tc := tc
+		t.Run(tc.name, func(t *testing.T) {
+			if tc.mutationStatus.String() != tc.expected {
+				t.Errorf(cmp.Diff(tc.mutationStatus.String(), tc.expected))
+			}
+		})
+	}
+}