More tests, better errors.

api/internal/target/kusttarget_test.go

@@ -203,7 +203,7 @@ func TestResourceNotFound(t *testing.T) {
 	if err == nil {
 		t.Fatalf("Didn't get the expected error for an unknown resource")
 	}
-	if !strings.Contains(err.Error(), `cannot read file`) {
+	if !strings.Contains(err.Error(), "'/whatever/deployment.yaml' doesn't exist") {
 		t.Fatalf("unexpected error: %q", err)
 	}
 }

api/internal/target/plugindir_test.go

@@ -81,7 +81,7 @@ metadata:
 		t.Fatalf("Err: %v", err)
 	}
 
-	th := kusttest_test.NewKustTestHarness(t, ".")
+	th := kusttest_test.NewKustTestHarness(t, filesys.SelfDir)
 	th.AssertActualEqualsExpected(m, `
 apiVersion: v1
 kind: WorkDir