43 lines
1.1 KiB
Scheme
43 lines
1.1 KiB
Scheme
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(define-module (test-geohash)
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#:use-module (geohash)
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#:use-module (ice-9 receive)
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#:use-module (srfi srfi-64))
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(define (approximately? test-expr expected error)
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(and (>= test-expr (- expected error))
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(<= test-expr (+ expected error))))
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(test-begin "geohash")
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(test-equal "encode Jutland"
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"u4pruy"
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(encode 57.648 10.410 #:precision 6))
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(test-assert "decode Jutland"
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(receive (lat lon) (decode "u4pruy")
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(and (approximately? lat 57.648 0.0001)
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(approximately? lon 10.410 0.0001))))
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(test-equal "encode Curitiba"
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"6gkzwgjz"
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(encode -25.38262 -49.26561 #:precision 8))
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(test-assert "decode Curitiba"
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(receive (lat lon) (decode "6gkzwgjz")
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(and (approximately? lat -25.38262 0.000001)
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(approximately? lon -49.26561 0.000001))))
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(test-equal "neighbours"
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'((n . "gbpb") (ne . "u000") (e . "spbp") (se . "spbn") (s . "ezzy") (sw . "ezzw") (w . "ezzx") (nw . "gbp8"))
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(neighbours "ezzz"))
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(test-equal "encode max precision"
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"wy85bj0hbp21"
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(encode 37.25 123.75 #:precision 12))
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(test-equal "encode default precision"
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"wy85bj"
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(encode 37.25 123.75))
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(test-end)
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