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@@ -0,0 +1,53 @@
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+// Copyright (C) 2021 The Android Open Source Project
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+//
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+// Licensed under the Apache License, Version 2.0 (the "License");
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+// you may not use this file except in compliance with the License.
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+// You may obtain a copy of the License at
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+//
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+// http://www.apache.org/licenses/LICENSE-2.0
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+//
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+// Unless required by applicable law or agreed to in writing, software
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+// distributed under the License is distributed on an "AS IS" BASIS,
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+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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+// See the License for the specific language governing permissions and
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+// limitations under the License.
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+
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+package android
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+
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+import "testing"
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+
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+type testSdkRegisterable struct {
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+ name string
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+}
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+
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+func (t *testSdkRegisterable) SdkPropertyName() string {
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+ return t.name
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+}
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+
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+var _ sdkRegisterable = &testSdkRegisterable{}
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+
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+func TestSdkRegistry(t *testing.T) {
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+ alpha := &testSdkRegisterable{"alpha"}
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+ beta := &testSdkRegisterable{"beta"}
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+ betaDup := &testSdkRegisterable{"beta"}
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+
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+ // Make sure that an empty registry is empty.
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+ emptyRegistry := &sdkRegistry{}
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+ AssertDeepEquals(t, "emptyRegistry should be empty", ([]sdkRegisterable)(nil), emptyRegistry.registeredObjects())
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+
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+ // Add beta to the empty registry to create another registry, check that it contains beta and make
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+ // sure that it does not affect the creating registry.
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+ registry1 := emptyRegistry.copyAndAppend(beta)
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+ AssertDeepEquals(t, "emptyRegistry should still be empty", ([]sdkRegisterable)(nil), emptyRegistry.registeredObjects())
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+ AssertDeepEquals(t, "registry1 should contain beta", []sdkRegisterable{beta}, registry1.registeredObjects())
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+
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+ // Add alpha to the registry containing beta to create another registry, check that it contains
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+ // alpha,beta (in order) and make sure that it does not affect the creating registry.
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+ registry2 := registry1.copyAndAppend(alpha)
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+ AssertDeepEquals(t, "registry1 should still contain beta", []sdkRegisterable{beta}, registry1.registeredObjects())
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+ AssertDeepEquals(t, "registry2 should contain alpha,beta", []sdkRegisterable{alpha, beta}, registry2.registeredObjects())
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+
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+ AssertPanicMessageContains(t, "duplicate beta should be detected", `"beta" already exists in ["alpha" "beta"]`, func() {
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+ registry2.copyAndAppend(betaDup)
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+ })
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+}
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