refactoring: have more physical units code in one place

1 files changed, 103 insertions, 0 deletions

diff --git a/tests/src/cgeo/geocaching/geopoint/UnitsTest.java b/tests/src/cgeo/geocaching/geopoint/UnitsTest.java
new file mode 100644
index 0000000..10f1785
--- /dev/null
+++ b/tests/src/cgeo/geocaching/geopoint/UnitsTest.java
@@ -0,0 +1,103 @@
+package cgeo.geocaching.geopoint;
+
+import cgeo.CGeoTestCase;
+import cgeo.geocaching.Settings;
+
+import org.apache.commons.lang3.StringUtils;
+
+public class UnitsTest extends CGeoTestCase {
+
+    private static void assertDistance(final String expected, final float distance) {
+        final String actual = Units.getDistanceFromKilometers(distance);
+        if (!StringUtils.equals(expected, actual.replace(',', '.'))) { // make 1.2 the same as 1,2
+            fail("getHumanDistance(" + distance +
+                    ") [metric: " + (Settings.isUseMetricUnits() ? "yes" : "no") +
+                    "] fails to match " + expected + ": " + actual);
+        }
+    }
+
+    // Make method non-static so that Settings is initialized
+    @SuppressWarnings("static-method")
+    public void testDistance() {
+        assertEquals("?", Units.getDistanceFromKilometers(null));
+        final boolean savedMetrics = Settings.isUseMetricUnits();
+        try {
+            Settings.setUseMetricUnits(true);
+            assertDistance("123 km", 122.782f);
+            assertDistance("123 km", 123.456f);
+            assertDistance("12.3 km", 12.3456f);
+            assertDistance("1.23 km", 1.23456f);
+            assertDistance("123 m", 0.123456f);
+            Settings.setUseMetricUnits(false);
+            assertDistance("76.7 mi", 123.456f);
+            assertDistance("7.67 mi", 12.3456f);
+            assertDistance("0.77 mi", 1.23456f);
+            assertDistance("405 ft", 0.123456f);
+            assertDistance("40.5 ft", 0.0123456f);
+        } finally {
+            Settings.setUseMetricUnits(savedMetrics);
+        }
+    }
+
+    // Make method non-static so that Settings is initialized
+    @SuppressWarnings("static-method")
+    public void testElevation() {
+        final boolean savedMetrics = Settings.isUseMetricUnits();
+        try {
+            Settings.setUseMetricUnits(true);
+            assertElevation("↥ 123 m", 122.782f);
+            assertElevation("↥ 123 m", 123.456f);
+            assertElevation("↥ 12 m", 12.3456f);
+            assertElevation("↥ 1 m", 1.23456f);
+            assertElevation("↥ 2 m", 1.6f);
+            assertElevation("↥ 0 m", 0.123456f);
+            assertElevation("↧ 123 m", -122.782f);
+            assertElevation("↧ 123 m", -123.456f);
+            assertElevation("↧ 12 m", -12.3456f);
+            assertElevation("↧ 1 m", -1.23456f);
+            assertElevation("↧ 2 m", -1.6f);
+            assertElevation("↧ 0 m", -0.123456f);
+            Settings.setUseMetricUnits(false);
+            assertElevation("↥ 405 ft", 123.456f);
+            assertElevation("↥ 41 ft", 12.3456f);
+        } finally {
+            Settings.setUseMetricUnits(savedMetrics);
+        }
+    }
+
+    private static void assertElevation(final String expected, final float meters) {
+        final String actual = Units.getElevation(meters);
+        if (!StringUtils.equals(expected, actual.replace(',', '.'))) {
+            fail("elevation " + actual + " does not match expected " + expected);
+        }
+    }
+
+    // Make method non-static so that Settings is initialized
+    @SuppressWarnings("static-method")
+    public void testSpeed() {
+        assertEquals("?", Units.getDistanceFromKilometers(null));
+        final boolean savedMetrics = Settings.isUseMetricUnits();
+        try {
+            Settings.setUseMetricUnits(true);
+            assertSpeed("123 km/h", 122.782f);
+            assertSpeed("123 km/h", 123.456f);
+            assertSpeed("12.3 km/h", 12.3456f);
+            assertSpeed("1.23 km/h", 1.23456f);
+            assertSpeed("123 m/h", 0.123456f);
+            Settings.setUseMetricUnits(false);
+            assertSpeed("76.7 mph", 123.456f);
+            assertSpeed("7.67 mph", 12.3456f);
+            assertSpeed("0.77 mph", 1.23456f);
+        } finally {
+            Settings.setUseMetricUnits(savedMetrics);
+        }
+    }
+
+    private static void assertSpeed(final String expected, final float kilometersPerHour) {
+        final String actual = Units.getSpeed(kilometersPerHour);
+        if (!StringUtils.equals(expected, actual.replace(',', '.'))) {
+            fail("speed " + actual + " does not match expected " + expected);
+        }
+    }
+
+}