+func TestCompactionPartsEndWithTheRestAndTheTask(t *testing.T) {
+ testCases := []struct {
+ name string
+ context string
+ want []string
+ }{
+ {
+ name: "empty view has the opening tag and the last part",
+ context: "<chat>\n</chat>",
+ want: []string{"<chat>\n", "</chat>\nTASK"},
+ },
+ {
+ name: "lines short of a block go into the last part",
+ context: "<chat>\n0+1|a\n1+1|b\n2+1|c\n</chat>",
+ want: []string{"<chat>\n", "0+1|a\n1+1|b\n2+1|c\n</chat>\nTASK"},
+ },
+ {
+ name: "one whole block",
+ context: "<chat>\n0+1|a\n1+1|b\n2+1|c\n3+1|d\n</chat>",
+ want: []string{"<chat>\n", "0+1|a\n1+1|b\n2+1|c\n3+1|d\n", "</chat>\nTASK"},
+ },
+ {
+ name: "two whole blocks and a rest",
+ context: "<chat>\n0+2|a\n2+1|b\n3+1|c\n4+1|d\n5+1|e\n6+1|f\n7+1|g\n8+1|h\n9+1|i\n</chat>",
+ want: []string{
+ "<chat>\n",
+ "0+2|a\n2+1|b\n3+1|c\n4+1|d\n",
+ "5+1|e\n6+1|f\n7+1|g\n8+1|h\n",
+ "9+1|i\n</chat>\nTASK",
+ },
+ },
+ }
+
+ for _, tc := range testCases {
+ t.Run(tc.name, func(t *testing.T) {
+ parts := compactionParts(tc.context, "TASK")
+ require.Equal(t, tc.want, parts)
+ require.Equal(t, tc.context+"\nTASK", strings.Join(parts, ""))
+ })
+ }
+}
+
+func TestCompactionPartsOfALongerViewBeginWithTheBlocksOfAShorterOne(t *testing.T) {
+ shorter := compactionParts("<chat>\n0+1|a\n1+1|b\n2+1|c\n3+1|d\n4+1|e\n</chat>", "task 5")
+ longer := compactionParts("<chat>\n0+1|a\n1+1|b\n2+1|c\n3+1|d\n4+1|e\n5+1|f\n6+1|g\n7+1|h\n</chat>", "task 8")
+ require.Len(t, shorter, 3)
+ require.Equal(t, shorter[:2], longer[:2])
+ require.NotEqual(t, shorter[2], longer[2])
+}
+