use lowecase for repository name

Raised:
Error response from daemon: no such image: pull_expectedSkipBuild:
invalid reference format: repository name must be lowercase

Signed-off-by: GitHub <noreply@github.com>

Author: satotake

local/e2e/compose/compose_dry_run_test.go

@@ -36,14 +36,14 @@ func TestComposePullDryRun(t *testing.T) {
 		res := c.RunDockerCmd("compose", "-f", "./fixtures/dry-run-test/pull/compose.yaml", "pull", "--dry-run")
 		lines := Lines(res.Stdout())
 		for _, line := range lines {
-			if strings.Contains(line, "expectedSkip") {
-				assert.Assert(t, strings.Contains(line, "skip"))
+			if strings.Contains(line, "expected-skip") {
+				assert.Assert(t, strings.Contains(line, " skip "))
 			}
-			if strings.Contains(line, "expectedFail") {
-				assert.Assert(t, strings.Contains(line, "fail"))
+			if strings.Contains(line, "expected-fail") {
+				assert.Assert(t, strings.Contains(line, " fail "))
 			}
-			if strings.Contains(line, "expectedFetch") {
-				assert.Assert(t, strings.Contains(line, "fetch"))
+			if strings.Contains(line, "expected-fetch") {
+				assert.Assert(t, strings.Contains(line, " fetch "))
 			}
 		}
 	})

local/e2e/compose/fixtures/dry-run-test/pull/compose.yaml

@@ -1,14 +1,14 @@
 services:
-  expectedFetch:
+  expected-fetch:
     image: hello-world
     command: top
-  expectedSkip:
+  expected-skip-already-exist:
     image: alpine
     command: top
-  expectedFail:
+  expected-fail:
     # this image is not expected to be registered on any registries
     image: expected-not-to-be-registered
     command: top
-  expectedSkip-build:
-    build: Dockerfile
+  expected-skip-build:
+    build: .
     command: top