Product Version: NetBeans IDE Dev (Build 201505020001)
Java: 1.8.0_45; Java HotSpot(TM) 64-Bit Server VM 25.45-b02
Runtime: Java(TM) SE Runtime Environment 1.8.0_45-b14
System: Windows 7 version 6.1 running on amd64; UTF-8; pl_PL (nb)

If a method with different signatures is used in a code, a hint to add a static import is not available.

Testcase:

public class SampleTest {

    public void testToString() {
        String exp = "";
        String result = toString();
        assertEquals(exp, result);
    }

    public void testDouble() {
        double exp = 0.0;
        double result = 0.0;
        assertEquals(exp, result, 0.0);
    }

}

Try to call hint at any of "assertEquals" - you will be offered only to create method. Now remove any of "assertEquals" and call hint at the other - you will be offered to add imports.

You may wonder why I didn't add import right after writing the first assertEquals - in this case the code with missing imports is an effect of bug 252173. But it could come from a simple copy-paste as well. It took me a while to find the reason and a reproducible testcase.