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Coalesce must have at least two arguments

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This commit is contained in:
Owen Stephens 2018-03-17 16:21:05 +00:00
parent 998eefc869
commit 6e02baaa8a
2 changed files with 7 additions and 8 deletions
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8
main/src/com/google/refine/expr/functions/Coalesce.java
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@ -46,7 +46,7 @@ public class Coalesce implements Function {
@Override @Override
public Object call(Properties bindings, Object[] args) { public Object call(Properties bindings, Object[] args) {
if (args.length> 0) { if (args.length> 1) {
for (int i = 0; i < args.length; i++){ for (int i = 0; i < args.length; i++){
if (args[i] == null) { if (args[i] == null) {
continue; continue;
@ -56,7 +56,7 @@ public class Coalesce implements Function {
} }
return null; return null;
} }
return new EvalError(ControlFunctionRegistry.getFunctionName(this) + " expects at least one argument"); return new EvalError(ControlFunctionRegistry.getFunctionName(this) + " expects at least two arguments");
} }
@Override @Override
@ -65,8 +65,8 @@ public class Coalesce implements Function {
writer.object(); writer.object();
writer.key("description"); writer.value("Returns the first non-null from a series of values"); writer.key("description"); writer.value("Returns the first non-null from a series of values");
writer.key("params"); writer.value("one or more objects"); writer.key("params"); writer.value("two or more objects");
writer.key("returns"); writer.value("object"); writer.key("returns"); writer.value("object or null");
writer.endObject(); writer.endObject();
} }
} }

7
main/tests/server/src/com/google/refine/tests/expr/functions/CoalesceTests.java
View File

@ -88,13 +88,12 @@ public class CoalesceTests extends RefineTest {
@Test @Test
public void testCoalesceInvalidParams() { public void testCoalesceInvalidParams() {
Assert.assertTrue(invoke("coalesce") instanceof EvalError); Assert.assertTrue(invoke("coalesce") instanceof EvalError);
Assert.assertTrue(invoke("coalesce", 1) instanceof EvalError);
} }
@Test @Test
public void testCoalesce() { public void testCoalesce() {
Assert.assertNull(invoke("coalesce", (Object) null)); Assert.assertNull(invoke("coalesce", (Object) null, (Object) null));
Assert.assertEquals(invoke("coalesce", "string"),"string");
Assert.assertEquals(invoke("coalesce", 1),1);
Assert.assertEquals(invoke("coalesce", (Object) null, "string"),"string"); Assert.assertEquals(invoke("coalesce", (Object) null, "string"),"string");
Assert.assertEquals(invoke("coalesce", (Object) null, (Object) null, "string"),"string"); Assert.assertEquals(invoke("coalesce", (Object) null, (Object) null, "string"),"string");
Assert.assertEquals(invoke("coalesce", (Object) null, 1),1); Assert.assertEquals(invoke("coalesce", (Object) null, 1),1);