@Test
public void symbolsCanBeSet() {
variables.put("a", "2");
verify(exec).assign("a", "2");
verifyNoMoreInteractions(exec);
}
@Test
public void setToNullRepresentationAssignsNull() {
variables.put("a", NULL);
verify(exec).assign("a", null);
}
@Test
public void setSymbolsAreReturned() {
when(exec.getSymbol("x")).thenReturn("1");
assertThat(variables.get("x"), is(equalTo("1")));
}
@Test
public void setToNullAssignsNull() {
variables.put("a", null);
verify(exec).assign("a", null);
}
@Test
public void unsetSymbolsReturnNull() {
when(exec.getSymbol("n")).thenReturn(null);
assertThat(variables.get("n"), is(equalTo(NULL)));
}
