From 7a186e9bc840bb42d8a3d670f63e498c88019e95 Mon Sep 17 00:00:00 2001
From: kwoyke <krzysztofwoyke@gmail.com>
Date: Thu, 9 Jan 2020 19:07:20 +0100
Subject: [PATCH] BAEL-3741: Add usage examples of @TestPropertySource (#8493)

---
 .../FilePropertyInjectionUnitTest.java        | 24 +++++++++++++++++++
 .../PropertyInjectionUnitTest.java            | 23 ++++++++++++++++++
 ...gBootPropertyInjectionIntegrationTest.java | 23 ++++++++++++++++++
 .../src/test/resources/foo.properties         |  1 +
 4 files changed, 71 insertions(+)
 create mode 100644 spring-boot-properties/src/test/java/com/baeldung/properties/testproperty/FilePropertyInjectionUnitTest.java
 create mode 100644 spring-boot-properties/src/test/java/com/baeldung/properties/testproperty/PropertyInjectionUnitTest.java
 create mode 100644 spring-boot-properties/src/test/java/com/baeldung/properties/testproperty/SpringBootPropertyInjectionIntegrationTest.java
 create mode 100644 spring-boot-properties/src/test/resources/foo.properties

diff --git a/spring-boot-properties/src/test/java/com/baeldung/properties/testproperty/FilePropertyInjectionUnitTest.java b/spring-boot-properties/src/test/java/com/baeldung/properties/testproperty/FilePropertyInjectionUnitTest.java
new file mode 100644
index 0000000000..874f632401
--- /dev/null
+++ b/spring-boot-properties/src/test/java/com/baeldung/properties/testproperty/FilePropertyInjectionUnitTest.java
@@ -0,0 +1,24 @@
+package com.baeldung.properties.testproperty;
+
+import org.assertj.core.api.Assertions;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.springframework.beans.factory.annotation.Value;
+import org.springframework.test.context.ContextConfiguration;
+import org.springframework.test.context.TestPropertySource;
+import org.springframework.test.context.junit4.SpringRunner;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+@RunWith(SpringRunner.class)
+@TestPropertySource("/foo.properties")
+public class FilePropertyInjectionUnitTest {
+
+    @Value("${foo}")
+    private String foo;
+
+    @Test
+    public void whenFilePropertyProvided_thenProperlyInjected() {
+        assertThat(foo).isEqualTo("bar");
+    }
+}
diff --git a/spring-boot-properties/src/test/java/com/baeldung/properties/testproperty/PropertyInjectionUnitTest.java b/spring-boot-properties/src/test/java/com/baeldung/properties/testproperty/PropertyInjectionUnitTest.java
new file mode 100644
index 0000000000..9492e18322
--- /dev/null
+++ b/spring-boot-properties/src/test/java/com/baeldung/properties/testproperty/PropertyInjectionUnitTest.java
@@ -0,0 +1,23 @@
+package com.baeldung.properties.testproperty;
+
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.springframework.beans.factory.annotation.Value;
+import org.springframework.test.context.ContextConfiguration;
+import org.springframework.test.context.TestPropertySource;
+import org.springframework.test.context.junit4.SpringRunner;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+@RunWith(SpringRunner.class)
+@TestPropertySource(properties = {"foo=bar"})
+public class PropertyInjectionUnitTest {
+
+    @Value("${foo}")
+    private String foo;
+
+    @Test
+    public void whenPropertyProvided_thenProperlyInjected() {
+        assertThat(foo).isEqualTo("bar");
+    }
+}
diff --git a/spring-boot-properties/src/test/java/com/baeldung/properties/testproperty/SpringBootPropertyInjectionIntegrationTest.java b/spring-boot-properties/src/test/java/com/baeldung/properties/testproperty/SpringBootPropertyInjectionIntegrationTest.java
new file mode 100644
index 0000000000..fdca7e814d
--- /dev/null
+++ b/spring-boot-properties/src/test/java/com/baeldung/properties/testproperty/SpringBootPropertyInjectionIntegrationTest.java
@@ -0,0 +1,23 @@
+package com.baeldung.properties.testproperty;
+
+import com.baeldung.properties.reloading.SpringBootPropertiesTestApplication;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.springframework.beans.factory.annotation.Value;
+import org.springframework.boot.test.context.SpringBootTest;
+import org.springframework.test.context.junit4.SpringRunner;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+@RunWith(SpringRunner.class)
+@SpringBootTest(properties = {"foo=bar"}, classes = SpringBootPropertiesTestApplication.class)
+public class SpringBootPropertyInjectionIntegrationTest {
+
+    @Value("${foo}")
+    private String foo;
+
+    @Test
+    public void whenSpringBootPropertyProvided_thenProperlyInjected() {
+        assertThat(foo).isEqualTo("bar");
+    }
+}
diff --git a/spring-boot-properties/src/test/resources/foo.properties b/spring-boot-properties/src/test/resources/foo.properties
new file mode 100644
index 0000000000..c9f0304f65
--- /dev/null
+++ b/spring-boot-properties/src/test/resources/foo.properties
@@ -0,0 +1 @@
+foo=bar
\ No newline at end of file