test: secrets completion

src/test/kotlin/it/casaricci/hass/plugin/completion/SecretsCompletionTest.kt

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+package it.casaricci.hass.plugin.completion
+
+import com.intellij.codeInsight.completion.CompletionType
+import com.intellij.testFramework.fixtures.LightPlatformCodeInsightFixture4TestCase
+import org.junit.Test
+
+class SecretsCompletionTest : LightPlatformCodeInsightFixture4TestCase() {
+
+    override fun getTestDataPath(): String = "src/test/resources/completion/secrets"
+
+    @Test
+    fun testCompletion() {
+        myFixture.configureByFiles("configuration.yaml", "secrets.yaml")
+        myFixture.complete(CompletionType.BASIC)
+        val lookupElementStrings = myFixture.lookupElementStrings
+        assertNotNull(lookupElementStrings)
+        assertSameElements(lookupElementStrings!!, "latitude_home", "longitude_home")
+    }
+
+}

src/test/resources/completion/secrets/configuration.yaml

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+homeassistant:
+  latitude: !secret <caret>

src/test/resources/completion/secrets/secrets.yaml

@@ -0,0 +1,2 @@
+latitude_home: 90
+longitude_home: 180