add simple LogbackTestExtensionAssert (#6076)

hapi-fhir-test-utilities/src/main/java/ca/uhn/test/util/LogbackTestExtensionAssert.java

@@ -0,0 +1,65 @@
+/*-
+ * #%L
+ * Prior Auth pas
+ * %%
+ * Copyright (C) 2014 - 2024 Smile CDR, Inc.
+ * %%
+ * All rights reserved.
+ * #L%
+ */
+package ca.uhn.test.util;
+
+import ch.qos.logback.classic.Level;
+import ch.qos.logback.classic.spi.ILoggingEvent;
+import jakarta.annotation.Nonnull;
+import org.assertj.core.api.AbstractAssert;
+import org.assertj.core.api.Assertions;
+import org.assertj.core.api.Condition;
+
+import java.util.List;
+import java.util.function.Predicate;
+
+public class LogbackTestExtensionAssert extends AbstractAssert<LogbackTestExtensionAssert, LogbackTestExtension> {
+	@Nonnull
+	public static LogbackTestExtensionAssert assertThat(@Nonnull LogbackTestExtension theLogbackTestExtension) {
+		return new LogbackTestExtensionAssert(theLogbackTestExtension, LogbackTestExtensionAssert.class);
+	}
+
+	private LogbackTestExtensionAssert(LogbackTestExtension theLogbackTestExtension, Class<?> selfType) {
+		super(theLogbackTestExtension, selfType);
+	}
+
+	@Nonnull
+	public LogbackTestExtensionAssert hasError(@Nonnull String theMessage) {
+		Assertions.assertThat(actual.getLogEvents()).has(eventWithLevelAndMessageContains(Level.ERROR, theMessage));
+		return this;
+	}
+
+	@Nonnull
+	public LogbackTestExtensionAssert hasInfo(@Nonnull String theMessage) {
+		Assertions.assertThat(actual.getLogEvents()).has(eventWithLevelAndMessageContains(Level.INFO, theMessage));
+		return this;
+	}
+
+	@Nonnull
+	public LogbackTestExtensionAssert hasDebug(@Nonnull String theMessage) {
+		Assertions.assertThat(actual.getLogEvents()).has(eventWithLevelAndMessageContains(Level.DEBUG, theMessage));
+		return this;
+	}
+
+	@Nonnull
+	public LogbackTestExtensionAssert isEmpty() {
+		Assertions.assertThat(actual.getLogEvents()).isEmpty();
+		return this;
+	}
+
+	@Nonnull
+	private Condition<? super List<? extends ILoggingEvent>> eventWithLevelAndMessageContains(@Nonnull Level theLevel, @Nonnull String theExpected) {
+		final Predicate<ILoggingEvent> loggingEvent = theLoggingEvent ->
+			theLoggingEvent.getLevel().equals(theLevel) && theLoggingEvent.getFormattedMessage().contains(theExpected);
+		final Predicate<List<? extends ILoggingEvent>> loggingEvents = theLoggingEvents ->
+			theLoggingEvents.stream().anyMatch(loggingEvent);
+		return new Condition<>(loggingEvents, "has error logging message with level %s and message containing %s", theLevel, theExpected);
+	}
+
+}