package main

import "testing"

func TestChooseTrustedSourceKeepsContinuingSourceAndRejectsNewJump(t *testing.T) {
	previous := []dailySourceLast{{
		VIN:            "LA9GG64L7PBAF4001",
		SourceKey:      normalizedSourceKey("13307765812", "115.231.168.135:42630"),
		Phone:          "13307765812",
		SourceEndpoint: "115.231.168.135:42630",
		TotalKM:        4100.8,
	}}
	current := []dailySourceLast{
		{
			VIN:            "LA9GG64L7PBAF4001",
			SourceKey:      normalizedSourceKey("13307765812", "115.159.85.149:28316"),
			Phone:          "13307765812",
			SourceEndpoint: "115.159.85.149:28316",
			TotalKM:        42447.2,
		},
		{
			VIN:            "LA9GG64L7PBAF4001",
			SourceKey:      normalizedSourceKey("13307765812", "115.231.168.135:20215"),
			Phone:          "13307765812",
			SourceEndpoint: "115.231.168.135:20215",
			TotalKM:        4123.9,
		},
	}

	chosen, ok := chooseTrustedSource(current, previous)
	if !ok {
		t.Fatal("chooseTrustedSource() did not choose a source")
	}
	if chosen.current.SourceKey != normalizedSourceKey("13307765812", "115.231.168.135:20215") {
		t.Fatalf("chosen source = %q", chosen.current.SourceKey)
	}
	if delta := chosen.current.TotalKM - chosen.previous.TotalKM; delta < 23 || delta > 24 {
		t.Fatalf("delta = %v, want about 23.1", delta)
	}
}