How to use

ColumnsImpl

in

com.nhaarman.sqlitebuilder.impl

 @NotNull
 @Override
 public CreateColumns columns(@NotNull final Column... columns) {
  return new ColumnsImpl(columns, this);
 }
}

@Test
public void prependToWithoutColumns_prependsProperSql() {
 /* Given */
 ColumnsImpl columns = new ColumnsImpl(new Column[0], mock(SqlPart.class));
 RawSqlBuilder builder = new RawSqlBuilderImpl();
 /* When */
 columns.prependTo(builder);
 /* Then */
 assertThat(builder.toString(), is("()"));
}

@Test
public void previous_returnsProperItem() {
 /* Given */
 SqlPart sqlPart = mock(SqlPart.class);
 ColumnsImpl columns = new ColumnsImpl(new Column[0], sqlPart);
 /* When */
 SqlPart result = columns.previous();
 /* Then */
 assertThat(result, is(sqlPart));
}

 @Test
 public void withoutRowId_returnsNotNullValue() {
  /* Given */
  ColumnsImpl columns = new ColumnsImpl(new Column[0], mock(SqlPart.class));

  /* When */
  WithoutRowId result = columns.withoutRowId();

  /* Then */
  assertThat(result, is(notNullValue()));
 }
}

@Test
public void prependToWithOneColumn_prependsProperSql() {
 /* Given */
 ColumnsImpl columns = new ColumnsImpl(new Column[] {new ColumnImpl("a")}, mock(SqlPart.class));
 RawSqlBuilder builder = new RawSqlBuilderImpl();
 /* When */
 columns.prependTo(builder);
 /* Then */
 assertThat(builder.toString(), is("(a)"));
}

@Test
public void prependToWithMultipleColumns_prependsProperSql() {
 /* Given */
 Column[] cs = {column("a"), column("b"), column("c")};
 ColumnsImpl columns = new ColumnsImpl(cs, mock(SqlPart.class));
 RawSqlBuilder builder = new RawSqlBuilderImpl();
 /* When */
 columns.prependTo(builder);
 /* Then */
 assertThat(builder.toString(), is("(a,b,c)"));
}

@NotNull
@Override
public CreateColumns columns(@NotNull final Column... columns) {
 return new ColumnsImpl(columns, this);
}