RandomValuePropertySourceTests Class — spring-boot Architecture

Source Code

core/spring-boot/src/test/java/org/springframework/boot/env/RandomValuePropertySourceTests.java lines 42–201

class RandomValuePropertySourceTests {

	private final RandomValuePropertySource source = new RandomValuePropertySource();

	@Test
	void getPropertyWhenNotRandomReturnsNull() {
		assertThat(this.source.getProperty("foo")).isNull();
	}

	@Test
	void getPropertyWhenStringReturnsValue() {
		assertThat(this.source.getProperty("random.string")).isNotNull();
	}

	@Test
	void getPropertyWhenIntReturnsValue() {
		Integer value = (Integer) this.source.getProperty("random.int");
		assertThat(value).isNotNull();
	}

	@Test
	void getPropertyWhenUuidReturnsValue() {
		String value = (String) this.source.getProperty("random.uuid");
		assertThat(value).isNotNull();
		assertThat(UUID.fromString(value)).isNotNull();
	}

	@Test
	void getPropertyWhenIntRangeReturnsValue() {
		Integer value = (Integer) this.source.getProperty("random.int[4,10]");
		assertThat(value).isNotNull();
		assertThat(value).isGreaterThanOrEqualTo(4);
		assertThat(value).isLessThan(10);
	}

	@Test
	void intRangeWhenLowerBoundEqualsUpperBoundShouldFailWithIllegalArgumentException() {
		assertThatIllegalStateException().isThrownBy(() -> this.source.getProperty("random.int[4,4]"))
			.withMessage("Lower bound must be less than upper bound.");
	}

	@Test
	void intRangeWhenLowerBoundNegative() {
		Integer value = (Integer) this.source.getProperty("random.int[-4,4]");
		assertThat(value).isGreaterThanOrEqualTo(-4);
		assertThat(value).isLessThan(4);
	}

	@Test
	void getPropertyWhenIntMaxReturnsValue() {
		Integer value = (Integer) this.source.getProperty("random.int(10)");
		assertThat(value).isNotNull().isLessThan(10);
	}

	@Test
	void intMaxZero() {
		assertThatIllegalStateException().isThrownBy(() -> this.source.getProperty("random.int(0)"))
			.withMessage("Bound must be positive.");
	}

	@Test
	void intNegativeBound() {
		assertThatIllegalStateException().isThrownBy(() -> this.source.getProperty("random.int(-5)"))
			.withMessage("Bound must be positive.");
	}

	@Test
	void getPropertyWhenLongReturnsValue() {
		Long value = (Long) this.source.getProperty("random.long");
		assertThat(value).isNotNull();
	}

	@Test
	void getPropertyWhenLongRangeReturnsValue() {
		Long value = (Long) this.source.getProperty("random.long[4,10]");
		assertThat(value).isNotNull().isBetween(4L, 10L);
	}

	@Test
	void longRangeWhenLowerBoundEqualsUpperBoundShouldFailWithIllegalArgumentException() {
		assertThatIllegalStateException().isThrownBy(() -> this.source.getProperty("random.long[4,4]"))
			.withMessage("Lower bound must be less than upper bound.");
	}

	@Test
	void longRangeWhenLowerBoundNegative() {
		Long value = (Long) this.source.getProperty("random.long[-4,4]");
		assertThat(value).isGreaterThanOrEqualTo(-4);
		assertThat(value).isLessThan(4);
	}

	@Test
	void getPropertyWhenLongMaxReturnsValue() {
		Long value = (Long) this.source.getProperty("random.long(10)");
		assertThat(value).isNotNull().isLessThan(10L);
	}

	@Test
	void longMaxZero() {
		assertThatIllegalStateException().isThrownBy(() -> this.source.getProperty("random.long(0)"))
			.withMessage("Bound must be positive.");
	}

	@Test
	void longNegativeBound() {
		assertThatIllegalStateException().isThrownBy(() -> this.source.getProperty("random.long(-5)"))
			.withMessage("Bound must be positive.");
	}

	@Test
	void getPropertyWhenLongOverflowReturnsValue() {
		RandomValuePropertySource source = spy(this.source);
		given(source.getSource()).willReturn(new Random() {

			@Override
			public long nextLong() {
				// constant that used to become -8, now becomes 8
				return Long.MIN_VALUE;
			}

		});
		Long value = (Long) source.getProperty("random.long(10)");
		assertThat(value).isNotNull().isGreaterThanOrEqualTo(0L).isLessThan(10L);
		value = (Long) source.getProperty("random.long[4,10]");
		assertThat(value).isNotNull().isGreaterThanOrEqualTo(4L).isLessThan(10L);
	}

	@Test
	void addToEnvironmentAddsSource() {
		MockEnvironment environment = new MockEnvironment();
		RandomValuePropertySource.addToEnvironment(environment);
		assertThat(environment.getProperty("random.string")).isNotNull();
	}

	@Test
	void addToEnvironmentWhenAlreadyAddedAddsSource() {
		MockEnvironment environment = new MockEnvironment();
		RandomValuePropertySource.addToEnvironment(environment);
		RandomValuePropertySource.addToEnvironment(environment);
		assertThat(environment.getProperty("random.string")).isNotNull();
	}

	@Test
	void addToEnvironmentAddsAfterSystemEnvironment() {
		MockEnvironment environment = new MockEnvironment();
		environment.getPropertySources()
			.addFirst(new SystemEnvironmentPropertySource(StandardEnvironment.SYSTEM_ENVIRONMENT_PROPERTY_SOURCE_NAME,
					Collections.emptyMap()));
		RandomValuePropertySource.addToEnvironment(environment);
		assertThat(environment.getPropertySources().stream().map(PropertySource::getName)).containsExactly(
				StandardEnvironment.SYSTEM_ENVIRONMENT_PROPERTY_SOURCE_NAME,
				RandomValuePropertySource.RANDOM_PROPERTY_SOURCE_NAME, "mockProperties");
	}

	@Test
	void randomStringIs32CharsLong() {
		assertThat(this.source.getProperty("random.string")).asString().hasSize(32);
	}

}