package fields

import "testing"

func TestGillhamToAltitude(t *testing.T) {

	tests := []struct {
		Test string
		Want int32
	}{
		{"00000000010", -1000},
		{"00000001010", -500},
		{"00000011010", 0},
		{"00000011110", 100},
		{"00000010011", 600},
		{"00000110010", 1000},
		{"00001001001", 5800},
		{"00011100100", 10300},
		{"01100011010", 32000},
		{"01110000100", 46300},
		{"10000000011", 126600},
		{"10000000001", 126700},
	}

	for _, test := range tests {
		t.Run(test.Test, func(t *testing.T) {
			alt, err := GillhamToAltitude(testString2Bits(test.Test))
			if err != nil {
				t.Fatalf("%v", err)
			}
			if alt != test.Want {
				t.Errorf("expected altitude %d, got %d", test.Want, alt)
			}
		})
	}
}

func testString2Bits(s string) (bool, bool, bool, bool, bool, bool, bool, bool, bool, bool, bool, bool) {
	d2 := s[0] == '1'
	d4 := s[1] == '1'
	a1 := s[2] == '1'
	a2 := s[3] == '1'
	a4 := s[4] == '1'
	b1 := s[5] == '1'
	b2 := s[6] == '1'
	b4 := s[7] == '1'
	c1 := s[8] == '1'
	c2 := s[9] == '1'
	c4 := s[10] == '1'

	return false, d2, d4, a1, a2, a4, b1, b2, b4, c1, c2, c4
}