我试图检查给定文件的类型，如果它是我所期望的。它可以有三个扩展名之一.fa，.fasta或.fasta.gz。看看其他问题，我认为这应该是相当微不足道的，但当我尝试的建议，他们不为我工作。
这是我试过的，所有的都不匹配：

#!/bin/bash

test1="abcdef.fa"
test2="ghijkl.fasta"
test3="mnopqr.fasta.gz"
echo "test1: $test1"
echo "test2: $test2"
echo "test3: $test3"

# Attempt 1
if [[ $test1 =~ *.fa|*.fasta|*.fasta.gz ]] &> /dev/null; then printf "Attempt1: Match with $test1\n"; fi
if [[ $test2 =~ *.fa|*.fasta|*.fasta.gz ]] &> /dev/null; then printf "Attempt1: Match with $test2\n"; fi
if [[ $test3 =~ *.fa|*.fasta|*.fasta.gz ]] &> /dev/null; then printf "Attempt1: Match with $test3\n"; fi

# Attempt 2 - do I need to quote the string?
if [[ "$test1" =~ *.fa|*.fasta|*.fasta.gz ]] &> /dev/null; then printf "Attempt2: Match with $test1\n"; fi
if [[ "$test2" =~ *.fa|*.fasta|*.fasta.gz ]] &> /dev/null; then printf "Attempt2: Match with $test2\n"; fi
if [[ "$test3" =~ *.fa|*.fasta|*.fasta.gz ]] &> /dev/null; then printf "Attempt2: Match with $test3\n"; fi

# Attempt 3 - alternative regex
if [[ $test1 =~ .\*.(fa|fasta|fasta.gz) ]] &> /dev/null; then printf "Attempt3: Match with $test1\n"; fi
if [[ $test2 =~ .\*.(fa|fasta|fasta.gz) ]] &> /dev/null; then printf "Attempt3: Match with $test2\n"; fi
if [[ $test3 =~ .\*.(fa|fasta|fasta.gz) ]] &> /dev/null; then printf "Attempt3: Match with $test3\n"; fi

# Attempt 4 - again with the quoted string
if [[ "$test1" =~ .\*.(fa|fasta|fasta.gz) ]] &> /dev/null; then printf "Attempt4: Match with $test1\n"; fi
if [[ "$test2" =~ .\*.(fa|fasta|fasta.gz) ]] &> /dev/null; then printf "Attempt4: Match with $test2\n"; fi
if [[ "$test3" =~ .\*.(fa|fasta|fasta.gz) ]] &> /dev/null; then printf "Attempt4: Match with $test3\n"; fi

# Attempt 5 - put $ on end of regex
if [[ $test1 =~ .\*.(fa|fasta|fasta.gz)$ ]] &> /dev/null; then printf "Attempt5: Match with $test1\n"; fi
if [[ $test2 =~ .\*.(fa|fasta|fasta.gz)$ ]] &> /dev/null; then printf "Attempt5: Match with $test2\n"; fi
if [[ $test3 =~ .\*.(fa|fasta|fasta.gz)$ ]] &> /dev/null; then printf "Attempt5: Match with $test3\n"; fi

# Attempt 6 - again with the quoted string
if [[ "$test1" =~ .\*.(fa|fasta|fasta.gz)$ ]] &> /dev/null; then printf "Attempt6: Match with $test1\n"; fi
if [[ "$test2" =~ .\*.(fa|fasta|fasta.gz)$ ]] &> /dev/null; then printf "Attempt6: Match with $test2\n"; fi
if [[ "$test3" =~ .\*.(fa|fasta|fasta.gz)$ ]] &> /dev/null; then printf "Attempt6: Match with $test3\n"; fi

# Attempt 7 - use double ||
if [[ $test1 =~ .\*.(fa||fasta||fasta.gz) ]] &> /dev/null; then printf "Attempt7: Match with $test1\n"; fi
if [[ $test2 =~ .\*.(fa||fasta||fasta.gz) ]] &> /dev/null; then printf "Attempt7: Match with $test2\n"; fi
if [[ $test3 =~ .\*.(fa||fasta||fasta.gz) ]] &> /dev/null; then printf "Attempt7: Match with $test3\n"; fi

我很接近这一点：

# Attempt 8 - escape parentheses
if [[ $test1 =~ .\*.\(fa|fasta|fasta.gz\) ]] &> /dev/null; then printf "Attempt8: Match with $test1\n"; fi
if [[ $test2 =~ .\*.\(fa|fasta|fasta.gz\) ]] &> /dev/null; then printf "Attempt8: Match with $test2\n"; fi
if [[ $test3 =~ .\*.\(fa|fasta|fasta.gz\) ]] &> /dev/null; then printf "Attempt8: Match with $test3\n"; fi

但是，第一个测试不起作用，输出如下所示：

test1: abcdef.fa
test2: ghijkl.fasta
test3: mnopqr.fasta.gz
Attempt8: Match with ghijkl.fasta
Attempt8: Match with mnopqr.fasta.gz

我错过了什么？