fix(integration-test): use a snapshot database for Docker mode (#352)

* fix(integration): add a binary name

The first argument is used for the program name. --skip-update was
ignored.

* fix(integration): use a snapshot database

After a new vulnerability is found, this test fails

* chore(integration): add t.Run

integration/docker_engine_test.go

@@ -38,6 +38,11 @@ func TestRun_WithDockerEngine(t *testing.T) {
 	}
 
 	for _, tc := range testCases {
+		t.Run(tc.name, func(t *testing.T) {
+			// Copy DB file
+			cacheDir := gunzipDB()
+			defer os.RemoveAll(cacheDir)
+
 			ctx := context.Background()
 			defer ctx.Done()
 
@@ -63,18 +68,13 @@ func TestRun_WithDockerEngine(t *testing.T) {
 				require.NoError(t, err, tc.name)
 			}
 
-		// run trivy
+			of, err := ioutil.TempFile("", "integration-docker-engine-output-file-*")
-		tmpDir, err := ioutil.TempDir("", "integration-docker-engine-*")
-		require.NoError(t, err)
-		defer func() {
-			os.RemoveAll(tmpDir)
-		}()
-
-		of, err := ioutil.TempFile(tmpDir, "integration-docker-engine-output-file-*")
 			require.NoError(t, err, tc.name)
-		app := internal.NewApp("dev")
+			defer os.Remove(of.Name())
 
-		trivyArgs := []string{"--skip-update", "--quiet", "--cache-dir", tmpDir, "--format=json"}
+			// run trivy
+			app := internal.NewApp("dev")
+			trivyArgs := []string{"trivy", "--skip-update", "--cache-dir", cacheDir, "--format=json"}
 			if !tc.invalidImage {
 				trivyArgs = append(trivyArgs, "--output", of.Name())
 			}
@@ -103,5 +103,6 @@ func TestRun_WithDockerEngine(t *testing.T) {
 				})
 				assert.NoError(t, err, tc.name)
 			}
+		})
 	}
 }